Unsteady Aerodynamic Analysis of Helicopter Rotor Blades Using Diagonal Implicit Harmonic Balance Method

대각 내재적 조화균형법을 이용한 헬리콥터 로터 블레이드의 비정상 공력 해석

In this paper, diagonal implicit harmonic balance method is applied to analyze helicopter rotor blade flow. Periodic boundary condition for Fourier coefficients is also applied in hover and forward flight condition. It is available enough to simulate the forward flight problem with only one rotor blade using the periodic boundary condition in frequency domain. In order to demonstrate present method Carodonna & Tung's rotor blades are used and the results are compared to time-accurate method and experimental data.